Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3105a4b606e350…

MALICIOUS

PDF

147.5 KB Created: 2021-05-10 06:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bc8aadf65973c8f14d0b56594941564 SHA-1: 82ccc06e723ac92b4fe22bd561d21dfe40da0e5b SHA-256: bd3105a4b606e350ae1b59799972a59ab932cf54a1ad40754df481aa707c6b96
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by multiple heuristics as a malicious advance-fee scam, specifically mentioning lottery or parcel delivery lures. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e338703cf---lomizevelobedifefonalilud.pdf
    • http://vladjurnalist.ru/archive/file/28536519651.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/8027fca384b198c1d6b018766c1d54b4/figuvogonifowurow.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9324623db1c96722f8671085475a3eff/wopewugavenux.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607685717f042---sagojojegodadovozasaf.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/gmcbaaemj4h8j778l6n7g4lkmq/89225696564.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/e3l6ook2tfhvdvdb8ecgup147q/42794538900.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748f6465409---zodabo.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/cjgqps7lmk1elnhhulr7dplo51/mirevapugeke.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1d67a4260---duxexafutow.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853694020a0---92697773602.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160805edb7b37c---fajekerinanekin.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7e41b1a1b---61355722694.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/85938649872.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=financial+reporting+manager+duties
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b27941e81---37453116678.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000203fb.bin
dbff33c94d88d6e75d7eefa67677dc411d76a30907a3b214560c9f03ac9f012d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x203FB 5348 bytes
font_01_sfnt_off00021611.bin
86b08fb4872b3e2afde55173f9591235b98c0bbc659d9f7471505cb534c584eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21611 12688 bytes

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